Top cover, sealing ring and filter for an outlet of a washbasin

ABSTRACT

A top cover, a sealing ring and a filter for an outlet of a washbasin are provided, wherein the filter includes a top cover including a cover body and an inner cover arranged below the cover body, a filter cylinder provided with a number of drainage holes at a cylinder body of the filter cylinder, and a sealing ring including a supporting part and a plugging part arranged at an outer edge of the supporting part; the cover body is configured to be located at a level above an opening surface of a drainer of the washbasin when in use to enable water flow being able to discharge through interspace between the top cover and the opening surface of the drainer, and the plugging part is configured to provide sealing contact with an inner wall of the drainer enabling to deposit sundries at the supporting part.

CROSS-REFERENCE TO RELATED APPLICATION

This application is based on and claims the benefit of priority from Chinese Patent Application No. 201711072270.3 filed on 3 Nov. 2017, the contents of which are incorporated by reference.

FIELD

The present disclosure relates to the field of filters, and in particular, to a top cover, sealing ring and filter for an outlet of a washbasin.

BACKGROUND

There is always a large amount of sewage flowing into the outlet of the washbasin, if small sundries such as hair and threads or the like carried in the sewage have not be filtered in time, they will tie and twine at the outlet, obstructing discharge of the sewage and even leading to blockage of the drain, thereby causing inconvenience. Therefore, a strainer is usually arranged at the outlet of the washbasin to filter the sewage. When the amount of sewage is small, the strainer can have a filtering effect on the sewage to some degree, however, once there is a large amount of sewage flowing into the outlet, the sundries carried in the sewage will accumulate at the strainer, obstructing discharge of the sewage, thereby the accumulated sundries need to be handled frequently in order to ensure smooth flow of the sewage. Moreover, because the drainers on the market have uniform models with different inner diameters and depths for various manufacturers (all configured by the manufacturers themself), it is difficult for some old-fashioned washbasins to adapt to the strainers available on the market.

Recently, some filters have appeared on the market. When in use, the filters are placed in the drainer to filter the sewage, and these filters have a larger space for the filtered sewage than the strainers, thus improving filtration performance. But existing filters do not match completely with the drainer, causing incomplete sealing between the filter and the inner wall of the drainer, thus incomplete filtration. When the sewage flows through, small sundries such as hair or the like may still flow into the drain, if things continue in this way, the sundries will accumulate in the drain causing blockage of the drain, which is difficult to deal with.

In addition, existing filters are unable to separate the sundries from the flowing water completely, and the sundries will seriously affect the flow speed. If the filters with large apertures are adopted, the desired filtration effect on small sundries such as hair or the like could not be achieved; if the filters with small apertures are adopted, the sundries will accumulate and block the water flow, leading to unsatisfactory performance on filtration.

SUMMARY

The present disclosure aims to provide a filter for an outlet of a washbasin, which solves the problems that existing filters are unable to seal drainers completely and to separate the sundries from the flowing water completely, thereby affecting the filtering effect and the water speed. Meanwhile, the present disclosure provides a top cover and a sealing ring for a washbasin respectively.

In order to achieve the above purpose, the present disclosure, according to a first aspect, provides a top cover for a washbasin, comprising a cover body and an inner cover arranged below the cover body, wherein the cover body is configured to be located at a level above an opening surface of a drainer of the washbasin when the inner cover is placed at the drainer, enabling water flow to discharge through interspace between the top cover and the drainer.

Preferably, the cover body has a top surface of a flat shape to form a flat top cover.

Alternatively, the cover body has a top surface of a circular arched shape to form a circular arched top cover.

Preferably, the circular arched top cover is provided with two or more supporting legs extending outwards and spaced apart at an edge of an arched portion of the circular arched top cover.

Preferably, the circular arched top cover has an outer diameter larger than an inner diameter of the drainer when the top cover is used.

Preferably, the cover body is provided with a number of drainage holes along its edge area.

Preferably, the inner cover is provided with a recess which is recessed downward, and the recess is provided with a number of drainage holes.

Preferably, the top cover is provided with a protrusion at an inner surface of the top cover, into which a threaded hole is opened, and the inner cover is provided with a through hole at the recess corresponding to the threaded hole, to enable connecting the inner cover to the cover body by a screw.

According to a second aspect of the present disclosure, a sealing ring for a washbasin is provided, comprising a supporting part, and a plugging part arranged at outer edge of the supporting part, wherein the plugging part is configured to provide sealing contact with an inner wall of a drainer when in use, enabling to deposit sundries at the supporting part.

Preferably, the sealing ring is made of elastic material.

Preferably, the plugging part is configured to extend obliquely in an upward and outward direction.

Preferably, the supporting part is arranged with a number of drainage holes spaced apart from one another.

According to a third aspect of the present disclosure, a filter for outlet of washbasin is provided, comprising: a top cover comprising a cover body and an inner cover arranged below the cover body; a filter cylinder, which is provided with a number of drainage holes at a cylinder body of the filter cylinder; and a sealing ring, comprising a supporting part and a plugging part arranged at an outer edge of the supporting part; wherein the top cover is configured to be connected to top of the filter cylinder through the inner cover, and the sealing ring is configured to be connected to bottom of the filter cylinder, and the cover body is configured to be located at a level above an opening surface of a drainer of the washbasin when in use to enable water flow being able to discharge through interspace between the top cover and the opening surface of the drainer, and the plugging part is configured to provide sealing contact with an inner wall of the drainer of the washbasin enabling to deposit sundries at the supporting part.

Preferably, the cover body has a top surface of a flat shape to form a flat top cover.

Alternatively, the cover body has a top surface of a circular arched shape to form a circular arched top cover.

Preferably, the circular arched top cover is provided with two or more supporting legs extending outwards and spaced apart at an edge of an arched portion of the circular arched top cover.

Preferably, the circular arched top cover has an outer diameter larger than an inner diameter of the drainer when the top cover is used.

Preferably, the cover body is provided with a number of drainage holes along its edge area.

Preferably, the inner cover is provided with a recess which is recessed downward, and the recess is provided with a number of drainage holes.

Preferably, the top cover is provided with a protrusion at an inner surface of the top cover, into which a threaded hole is opened, and the inner cover is provided with a through hole at the recess corresponding to the threaded hole, to enable connecting the inner cover to the cover body by a screw.

Preferably, the sealing ring is made of elastic material.

Preferably, the plugging part is configured to extend obliquely in an upward and outward direction.

Preferably, the supporting part is arranged with a number of drainage holes spaced apart from one another.

Preferably, the supporting part is snapped at outside of the cylinder body of the filter cylinder to detachably connect the sealing ring with the filter cylinder.

Preferably, the filter cylinder further comprises a connecting component configured to be connected to the bottom of the cylinder body of the filter cylinder, and the supporting part is configured to be snapped at outside of the connecting component to detachably connect the sealing ring with the filter cylinder.

According to a fourth aspect of the present disclosure, a filter for an outlet of a washbasin is provided, comprising: a top cover, comprising a cover body; a filter cylinder, which is provided with a number of drainage holes at a cylinder body of the filter cylinder; and a sealing ring, comprising a supporting part and a plugging part arranged at an outer edge of the supporting part; wherein the top cover is configured to be connected to top of the filter cylinder, and the sealing ring is configured to be connected to bottom of the filter cylinder, and the cover body is configured to be located at a level above an opening surface of a drainer of the washbasin when in use to enable water flow being able to discharge through interspace between the top cover and the opening surface of the drainer, and the plugging part is configured to provide sealing contact with an inner wall of the drainer of the washbasin enabling to deposit sundries at the supporting part.

Advantages of the present disclosure are as follows:

the filter for an outlet of a washbasin provided in the present disclosure comprises a top cover, a filter cylinder and a sealing ring. The cylinder body of filter cylinder is provided with a number of drainage holes, and the bottom of the filter cylinder is arranged with the sealing ring provided with the plugging part, such that the sundries carried in the sewage are unable to pass through the drainage holes provided by the cylinder body of the filter cylinder but filtered and accumulated at the plugging part of the sealing ring when the sewage passes through the filter for an outlet of a washbasin, thereby separating the sundries in the sewage. Although partial drainage holes arranged at the bottom of the cylinder body may be blocked by the sundries, the sewage can still be discharged from the drainage holes arranged at upper part of the cylinder body, thus the water flow speed will not be affected by the accumulated sundries. Since the plugging part of the sealing ring is arranged at the outer edge of the supporting part, preferably extending obliquely in an upward and outward direction, the sealing ring can fit and seal with the inner wall of the drainer, thereby preventing the sundries from falling into the drain and affecting discharging. The sealing ring is snapped outside the connecting component and detachably connected to the filter cylinder, which enables flexible detachment, cleaning, and convenient replacement.

DRAWINGS

FIGS. 1 and 2 are structural schematic diagrams of the top cover for a washbasin provided in accordance with embodiment 1.

FIGS. 3 and 4 are structural schematic diagrams of the top cover for a washbasin provided in accordance with embodiment 2.

FIG. 5 is a structural schematic diagram of the top cover for a washbasin provided in accordance with embodiment 3.

FIGS. 6-8 are structural schematic diagrams of the top cover for a washbasin provided in accordance with embodiment 4.

FIG. 9 is a structural schematic diagram of the sealing ring for a washbasin provided in accordance with embodiment 5.

FIG. 10 is a structural schematic diagram of the sealing ring for a washbasin provided in accordance with embodiment 6.

FIG. 11 is a structural schematic diagram of the filter for an outlet of a washbasin provided in accordance with embodiment 7.

FIG. 12 is a structural exploded diagram of the filter for an outlet of a washbasin provided in accordance with embodiment 7.

FIG. 13 is a structural schematic diagram of the filter for an outlet of a washbasin provided in accordance with embodiment 9.

FIG. 14 is a structural exploded diagram of the filter for an outlet of a washbasin provided in accordance with embodiment 9.

FIG. 15 is a cross-section view of the filter for an outlet of a washbasin provided in accordance with embodiment 9.

FIG. 16 is a cross-section view of the filter for an outlet of a washbasin provided in accordance with embodiment 10.

FIG. 17 is a cross-section view of the filter for an outlet of a washbasin provided in accordance with embodiment 11.

DETAILED DESCRIPTION

The following embodiments are only intended to describe the present disclosure, but not to limit the scope of the present disclosure. Unless specified otherwise, the additional technical features of the following various embodiments of the present disclosure can be combined or replaced with each other.

Embodiment 1

With reference to FIGS. 1 and 2, the present embodiment provides a top cover 100 for a washbasin, wherein the top cover 100 may comprise a cover body 110 and an inner cover 120 arranged below the cover body 110. When the inner cover 120 is placed at the drainer of the washbasin, the cover body 110 will be at a level above the opening surface 410 of the drainer 400, such that the water flow can pass through the interspace between the top cover 100 and the opening surface 410 of the drainer 400. Therein, the cover body 110 and the inner cover 120 may be either an integral molding structure or two independent components. In the later case, the cover body 110 and the inner cover 120 can be fixed to each other by any means when in use.

As a preferred implementation of the above embodiment 1, the cover body 110 may have a top surface of a flat shape to form a flat top cover.

Embodiment 2

With reference to FIGS. 3 and 4, the present embodiment provides a top cover 100 for a washbasin, wherein the top cover 100 may comprise a cover body 110 and an inner cover 120 arranged below the cover body 110. When the inner cover 120 is placed at the drainer of the washbasin, the cover body 110 will be at a level above the opening surface 410 of the drainer 400, such that the water flow can pass through the interspace between the top cover 100 and the opening surface 410 of the drainer 400.

As a preferred implementation of the above embodiment 2, the top surface of the cover body 110 may be arranged as circular arch so as to form a circular arched top cover.

As further improvement of the above embodiment 2 of the present disclosure, two or more supporting legs 112 extending outwards may be arranged spaced apart at the edge of an arched portion 111 of the circular arched top cover, wherein the spacing distance between two adjacent supporting legs 112 may be set arbitrarily.

As a preferred implementation of the above embodiment 2 of the present disclosure, an outer diameter of the circular arched top cover can be set to be larger than an inner diameter of the drainer of the washbasin when in use. It should be noted that, since the drainer 400 of the washbasin may have an inner diameter with multiple specifications, the top cover 100 provided in the present disclosure may have multiple specifications, so as to be used together with different washbasin drainers.

Embodiment 3

With reference to FIG. 5, the present embodiment provides a top cover 100 for a washbasin, which comprises the basic structure provided in the above embodiment 1 or embodiment 2, and on this basis, the cover body 110 may further be provided with a number of drainage holes 113 along its periphery, such that a small part of sewage can also flow through said drainage holes. Herein, the cover body 110 shown in (a) and (b) of FIG. 5 is provided with three supporting legs 112, and the cover body 110 shown in (c) of FIG. 5 is provided with four supporting legs 112. However, FIG. 5 is just exemplary, and the number of the supporting legs of the top cover proposed by the present disclosure may be set arbitrarily.

Embodiment 4

With reference to FIGS. 6-8, the present embodiment provides a top cover 100 for a washbasin, which comprises the basic structure provided in the above embodiment 1 or embodiment 2, and on this basis, the inner cover 120 of the top cover 100 in this embodiment may further be provided with a recess 121 which is recessed downwards, and the recess 121 may be provided with a number of drainage holes 122 thereon.

As a further improvement of the above embodiment 4 in the present disclosure, the inner surface of the top cover 100 may be provided with a protrusion 114 which may be arranged with a threaded hole 115 therein, and the recess 121 of the inner cover 120 may be arranged with a through hole 123, such that the inner cover 120 can be fixed to the cover body 110 by a screw 130 when the through hole 123 is aligned with the threaded hole 115. Herein, the structure of the protrusion 114 in figures is just exemplary, and the protrusion 114 may be in any shape as needed, as long as it can be used to fix the inner cover 120 to the cover body 110. FIG. 8 exemplarily shows the cross-section view of the inner cover 120 and the cover body 110 after they are fixed.

Embodiment 5

With reference to FIG. 2, FIG. 4, FIG. 9 and FIGS. 14-16, the present embodiment provides a sealing ring 300 for a washbasin, wherein the sealing ring 300 may comprise a supporting part 310 and a plugging part 320 arranged at an outer edge of the supporting part 310 such that the plugging part 310 may be in sealing contact with the inner wall 420 of the drainer 400 when in use, thereby the sundries may be deposited on the supporting part 310. Herein, the supporting part 310 and the plugging part 320 may be integrally molded or be independent components.

As a preferred implementation of the above embodiment 5 in the present disclosure, the sealing ring 300 can be made of elastic materials.

As a preferred implementation of the above embodiment 5 in the present disclosure, the plugging part 320 may be arranged to extend obliquely in an upward and outward direction.

Embodiment 6

With reference to FIG. 10, the present embodiment provides a sealing ring 300 for a washbasin, which comprises the basic structure provided in the embodiment 5, and on this basis, the supporting part 310 may further be provided with a number of drainage holes 311 spaced apart.

Embodiment 7

With reference to FIGS. 1-4 and FIGS. 11-12, the present embodiment provides a filter for an outlet of a washbasin, which comprises:

a top cover 100, which comprises a cover body 110 and an inner cover 120 arranged below the cover body 110,

a filter cylinder 200, which is provided with a number of drainage holes 210 on the cylinder body thereof, and

a sealing ring 300, which comprises a supporting part 310 and a plugging part 320 arranged at an outer edge of the supporting part 310, wherein,

the top cover 100 is connected to the top of the filter cylinder 200 through the inner cover 120, and the sealing ring 300 is connected to the bottom of the filter cylinder 200. When the filter for an outlet of a washbasin is used, the cover body 110 is at a level above the opening surface 410 of the drainer 400 so that the water flow can pass through the interspace between the top cover 100 and the opening surface 410 of the drainer 400, and the plugging part 320 is in sealing contact with the inner wall 420 of the drainer 400 for a washbasin thereby to deposit the sundries at the supporting part 310.

The above embodiment 7 illustrates the filter for an outlet of a washbasin of the present disclosure, unless specified otherwise, the filter for an outlet of a washbasin proposed by the present disclosure may use the top cover or sealing ring provided in accordance with any of above embodiments 1-6. For example, the number of the supporting legs of the top cover, used in the filter for an outlet of a washbasin proposed by the present disclosure, may be arbitrary, the cover body may be provided with or without drainage holes, the cover body may be formed in a flat or a circular arched shape, the inner cover may be provided with or without a recess, and the connection modes between the inner cover and the cover body can be set according to requirements. For example again, the sealing ring, which is used in the filter for an outlet of a washbasin proposed by the present disclosure, may be provided with or without drainage holes.

Embodiment 8

The present embodiment provides a filter for an outlet of a washbasin, which comprises:

a top cover 100, which may only comprise a cover body 110 in the present embodiment when compared with the embodiment 7,

a filter cylinder 200, which is provided with a number of drainage holes 210 on the cylinder body thereof, and

a sealing ring 300, which comprises a supporting part 310 and a plugging part 320 arranged at an outer edge of the supporting part 310, wherein

the top cover 100 is connected to the top of the filter cylinder 200, and the sealing ring 300 is connected to the bottom of the filter cylinder 200. When the filter for an outlet of a washbasin is used, the cover body 110 is at a level above the opening surface 410 of the drainer 400 so that the water flow can pass through the interspace between the top cover 100 and the opening surface 410 of the drainer 400, and the plugging part 320 is in sealing contact with the inner wall 420 of the drainer 400 thereby to deposit the sundries on the supporting part 310.

Further detailed description of the filter for an outlet of a washbasin of the present disclosure will be given with another three specific embodiments hereinafter. The following exemplary embodiments are merely to illustrate the filter for an outlet of a washbasin proposed by the present disclosure, and not intended to limit the scope of the filter for an outlet of a washbasin of the present disclosure.

Embodiment 9

With reference to FIGS. 13-15, the filter for an outlet of a washbasin provided in the present embodiment comprises a top cover 100, a filter cylinder 200 and a sealing ring 300, wherein the top cover 100 and the sealing ring 300 are respectively connected to the top and bottom of the filter cylinder 200.

Herein, the top cover 100 comprises an arched portion 111 and three supporting legs 112. The three supporting legs 112 are arranged as rotationally symmetrical about the symmetrical centerline of the arched portion 111, i.e., the three supporting legs may overlap when the top cover is rotated about the symmetrical centerline of the arched portion 111 by 120°, and the supporting legs 112 respectively extend outwards along the edge of the arched portion 111 such that the top cover 100 is in a structure of circular arch. The arched portion 111 of the top cover 100 is located at the center of the top of the filter for an outlet of a washbasin, is provided with drainage holes 113 circumferentially spaced apart from one another, and is provided with a protrusion 114 on the inner surface thereof, into which a threaded hole 115 is opened.

The filter cylinder 200 comprises an inner cover 120, a cylinder body and a connecting component 220. Through the manner of laser spot welding, the inner cover 120 is welded and fixed on the top of the cylinder body, and the connecting component 220 is welded to the bottom of the cylinder body. The inner cover 120 is provided with a recess 121 which is recessed downwards, and the recess 121 is provided with a through hole 123 and a number of drainage holes 122. The position of the through hole 123 needs to be aligned with the position of the threaded hole 115, and the drainage holes 122 are evenly spaced, discharging the accumulated sewage. The cylinder body is provided evenly with a number of drainage holes 210. The connecting component 220 is in a structure of an annular ring and comprises a groove 221, an upper support 222, and a lower support 223, wherein the upper support 222 and the lower support 223 are arranged at the top and bottom of the groove 221 respectively.

The sealing ring 300 comprises a supporting part 310 and a plugging part 320 arranged at an outer edge of the supporting part 310, extending obliquely in an upward and outward direction. The supporting part 310 is provided circumferentially with a number of drainage holes 311 with a diameter less than that of the drainage holes 210. The sealing ring 300 is made of, but not limited to, materials with good elasticity such as rubber or the like.

The top cover 100 may be connected to the inner cover 120 by fastening of the screw 130 to the threaded hole 115 in the protrusion 114 via the through hole 123 arranged at the inner cover 120, thereby the top cover 100 may be fastened to the filter cylinder 200. The sealing ring 300 is connected with the connecting component 220 by a snap-fit connection, wherein the supporting part 310 of the sealing ring 300 is snapped into the groove 221 of the connecting component 220, and the upper support 222 and the lower support 223 may collectively provide a location-limited support for the sealing ring 300, such that the sealing ring 300 and the filter cylinder 200 can be detachably connected together.

When the filter for an outlet of a washbasin is used, the top cover 100 is placed at a top opening of the drainer 400. Since the top cover 100 is provided with the arched portion 111 which is supported by three supporting legs 112, the sewage can flow through the interspace between the supporting legs 112, and the sewage can be discharged through the drainage holes 113 provided on the top cover 100 at the same time. When the sewage flows through the filter cylinder 200, the cylinder body filters the sewage, and the sundries such as hair and threads or the like will be obstructed outside the filter cylinder 200 and accumulated at the sealing ring 300, thus preventing the accumulated sundries from falling into the drain effectively, and meanwhile, the water flow may be discharged through the drainage holes 210 provided on the cylinder body and drainage holes 311 provided on the supporting part 310.

After the filter for an outlet of a washbasin is used for a period of time, the sealing ring 300, on which a large number of sundries have been accumulated and needed to be dealt with, may be disassembled for cleaning or replacement flexibly due to the detachable connection of the sealing ring 300 with the filter cylinder 200.

It should be noted that the top cover in the present embodiment is a circular arched top cover with three supporting legs, practically, if a supporting frame 430 is arranged in the drainer, the top cover in the present disclosure may selected from a flat top cover or a circular arched top cover without providing supporting legs. Furthermore, the number of the supporting legs may be arranged as 4, 6, or otherwise. The top cover and filter cylinder in the present disclosure can be made of metals, plastics or other materials, and the sealing ring can be made of other materials with softness and elasticity. Moreover, the diameter of the sealing ring can be 46.40 mm, 43.00 mm, 40.00 mm, 38.20 mm or other size, which can be selected flexibly according to the size of the drainer. By means of laser welding, the inner cover is welded to the top of the cylinder body and the connecting component is welded to the lower part of the cylinder body in the present embodiment, practically, the means of welding may be one selected from electron beam welding, plasma welding, resistance welding or argon arc welding.

Embodiment 10

The filter for an outlet of a washbasin provided in the present embodiment is substantially the same as that provided in the embodiment 9, and the difference lies in that the number of the supporting legs of the filter for an outlet of a washbasin differs from that provided in the embodiment 9.

With reference to FIG. 16, the filter for an outlet of a washbasin provided in the present embodiment comprises a top cover 100, a filter cylinder 200 and a sealing ring 300, wherein the top cover 100 and the sealing ring 300 are respectively connected to the top and bottom of the filter cylinder 200. Herein, the top cover 100 comprises an arched portion 111 and four supporting legs 112. The four supporting legs 112 are arranged as rotationally symmetrical about the symmetrical centerline of the arched portion, i.e., the four supporting legs can overlap after the top cover is rotated about the symmetrical centerline of the arched portion by 90°, and the supporting legs 112 extend outwards respectively along the edge of the arched portion 111, such that the top cover 100 is in a structure of circular arch. The arched portion 111 of the top cover 100 is located at the center of the filter for an outlet of a washbasin, is provided with drainage holes 113 circumferentially spaced apart from one another, and is provided with a protrusion 114 on the inner surface thereof, into which a threaded hole 115 is opened.

The structure and connection methods of the filter cylinder 200 and sealing ring 300 of the filter for an outlet of a washbasin provided in this embodiment are the same as those provided in embodiment 9, which will be not described herein again.

Embodiment 11

The filter for an outlet of a washbasin provided in this embodiment is substantially the same as that of embodiment 9, the specific structure of which will not be described herein again.

With reference to FIG. 17, the top cover 100 of the filter for an outlet of a washbasin provided in this embodiment is a flat top cover. The filter for an outlet of a washbasin provided in this embodiment needs to used cooperatively with the supporting frame 430, thus the top cover 100 is unnecessarily arranged with supporting legs, certainly, the top cover 100 may also be arranged as a circular arched top cover. The supporting frame 430 is arranged inside the drainer 400 to restrict the relative position of the filter for an outlet of a washbasin and the drainer 400, and when the filter for an outlet of a washbasin is placed on the supporting frame 430, the top cover 100 of the filter for an outlet of a washbasin is generally at a level above the opening surface 410 of the drainer 400.

The filters for the outlet of washbasin provided in embodiments 9, 10 and 11 may provide good stability, and may separate the sundries in the sewage completely, without affecting the speed of the water flow at the time when the sundries are filtered. The sealing ring is made of rubber, with advantages of softness and large deformation, which overcomes the problem among traditional filters that is difficult to compatible due to hardness. The sealing ring having corresponding size may be matched according to the model of the drainer, such that the sealing ring can fit and seal drainers with different models completely, facilitating wider application of the filter for the outlet of washbasin and more thorough filtration. Furthermore, the sealing ring and the filter cylinder are connected together by a snap-fit connection, which enables flexible detachment. After the filter is used for a period of time, the sealing ring can be removed and cleaned, or replaced as a consumable with low value, which can save time and effort.

According to some embodiments mentioned above, such as embodiments 7-11, the inner cover can be arranged according to requirements. For example, the inner cover can be a part of the top cover integrally molded with the cover body, or an independent component fixed and connected to the cover body. For example again, the inner cover can be a part of the filter cylinder integrally molded with the cylinder body of the filter cylinder, or an independent component fixed and connected to the cylinder body of the filter cylinder. Furthermore, the filter for an outlet of a washbasin proposed in the present disclosure may be provided with or without the inner cover, as long as the top cover can be connected to the top of the filter cylinder.

In the present disclosure, the terms “connect”, “fix” and the like should be understood broadly unless specifically defined or limited otherwise, and for example, they may be fixed connection, detachable connection, or integrally molded; they may be mechanical connection, direct connection or indirect connection through an intermediary, which may be an internal communication of two elements or an interaction for two elements. For an ordinary skilled in the art, the specific meanings of the above terms in the present disclosure may be understood according to specific situations.

In the present disclosure, unless specifically defined and defined otherwise, that the first feature is located “above” or “below” the second feature may be a direct contact between the first and second features, or indirect contact between the first and second features through the intermediary. Furthermore, that the first feature is located “on top of”, “above” or “on” the second feature may be that the first feature is directly above or diagonally above the second feature, or merely indicate that the first feature is at a level higher than the second feature. That the first feature is located “on bottom of”, “below” or “beneath” the second feature may be that the first feature is directly below or diagonally below the second feature, or merely indicate that the first feature is at a level lower than the second feature.

In the description of the present specification, the description the referential terms “one embodiment”, “some embodiments”, “an example”, “specific example”, or “some examples” or the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, those skilled in the art may combine or associate different embodiments or examples, or the features of different embodiments or examples described in this specification without conflicting with each other.

Although the present disclosure has been described above in detail with general description and specific embodiments, some modifications and improvements can be made based on the present disclosure, which is obvious for those skilled in this art. Therefore, those modifications and improvements made without departing from the spirit of the present disclosure shall fall within the scope of the claimed disclosure. 

What is claimed is:
 1. A top cover for a washbasin, comprising: a cover body, and an inner cover arranged below the cover body, wherein the cover body is configured to be located at a level above an opening surface of a drainer of the washbasin when the inner cover is placed at the drainer, enabling water flow to discharge through interspace between the top cover and the drainer.
 2. The top cover for a washbasin of claim 1, wherein the cover body has a top surface of a flat shape to form a flat top cover.
 3. The top cover for a washbasin of claim 1, wherein the cover body has a top surface of a circular arched shape to form a circular arched top cover.
 4. The top cover for a washbasin of claim 3, wherein the circular arched top cover is provided with two or more supporting legs extending outwards and spaced apart at an edge of an arched portion of the circular arched top cover.
 5. The top cover for a washbasin of claim 4, wherein the circular arched top cover has an outer diameter larger than an inner diameter of the drainer when the top cover is used.
 6. The top cover for a washbasin of claim 1, wherein the cover body is provided with a number of drainage holes along its edge area.
 7. The top cover for a washbasin of claim 1, wherein the inner cover is provided with a recess which is recessed downward, and the recess is provided with a number of drainage holes.
 8. The top cover for a washbasin of claim 7, wherein the top cover is provided with a protrusion at an inner surface of the top cover, into which a threaded hole is opened, and the inner cover is provided with a through hole at the recess corresponding to the threaded hole, to enable connecting the inner cover to the cover body by a screw.
 9. A sealing ring for a washbasin, comprising: a supporting part, and a plugging part arranged at outer edge of the supporting part, wherein the plugging part is configured to provide sealing contact with an inner wall of a drainer when in use, enabling to deposit sundries at the supporting part.
 10. The sealing ring for a washbasin of claim 9, wherein the sealing ring is made of elastic material.
 11. The sealing ring for a washbasin of claim 9, wherein the plugging part is configured to extend obliquely in an upward and outward direction.
 12. The sealing ring for a washbasin of claim 9, wherein the supporting part is arranged with a number of drainage holes spaced apart from one another.
 13. A filter for an outlet of a washbasin, comprising: a top cover, comprising a cover body and an inner cover arranged below the cover body; a filter cylinder, which is provided with a number of drainage holes at a cylinder body of the filter cylinder; and a sealing ring, comprising a supporting part and a plugging part arranged at an outer edge of the supporting part; wherein the top cover is configured to be connected to top of the filter cylinder through the inner cover, and the sealing ring is configured to be connected to bottom of the filter cylinder, and the cover body is configured to be located at a level above an opening surface of a drainer of the washbasin when in use to enable water flow being able to discharge through interspace between the top cover and the opening surface of the drainer, and the plugging part is configured to provide sealing contact with an inner wall of the drainer of the washbasin enabling to deposit sundries at the supporting part.
 14. The filter for an outlet of a washbasin of claim 13, wherein the cover body has a top surface of a flat shape to form a flat top cover.
 15. The filter for an outlet of a washbasin of claim 13, wherein the cover body has a top surface of a circular arched shape to form a circular arched top cover.
 16. The filter for an outlet of a washbasin of claim 15, wherein the circular arched top cover is provided with two or more supporting legs extending outwards and spaced apart at an edge of an arched portion of the circular arched top cover.
 17. The filter for an outlet of a washbasin of claim 16, wherein the circular arched top cover has an outer diameter larger than an inner diameter of the drainer when the top cover is used.
 18. The filter for an outlet of a washbasin claim 13, wherein the cover body is provided with a number of drainage holes along its edge area.
 19. The filter for an outlet of a washbasin of claim 13, wherein the inner cover is provided with a recess which is recessed downward, and the recess is provided with a number of drainage holes.
 20. The filter for an outlet of a washbasin of claim 19, wherein the top cover is provided with a protrusion at an inner surface of the top cover, into which a threaded hole is opened, and the inner cover is provided with a through hole at the recess corresponding to the threaded hole, to enable connecting the inner cover to the cover body by a screw.
 21. The filter for an outlet of a washbasin of claim 13, wherein the sealing ring is made of elastic material.
 22. The filter for an outlet of a washbasin of claim 13, wherein the plugging part is configured to extend obliquely in an upward and outward direction.
 23. The filter for an outlet of a washbasin of claim 13, wherein the supporting part is arranged with a number of drainage holes spaced apart from one another.
 24. The filter for an outlet of a washbasin of claim 13, wherein the supporting part is snapped at outside of the cylinder body of the filter cylinder to detachably connect the sealing ring with the filter cylinder.
 25. The filter for an outlet of a washbasin of claim 13, wherein the filter cylinder further comprises a connecting component configured to be connected to the bottom of the cylinder body of the filter cylinder, and the supporting part is configured to be snapped at outside of the connecting component to detachably connect the sealing ring with the filter cylinder.
 26. A filter for an outlet of a washbasin, comprising: a top cover, comprising a cover body; a filter cylinder, which is provided with a number of drainage holes at a cylinder body of the filter cylinder; and a sealing ring, comprising a supporting part and a plugging part arranged at an outer edge of the supporting part; wherein the top cover is configured to be connected to top of the filter cylinder, and the sealing ring is configured to be connected to bottom of the filter cylinder, and the cover body is configured to be located at a level above an opening surface of a drainer of the washbasin when in use to enable water flow being able to discharge through interspace between the top cover and the opening surface of the drainer, and the plugging part is configured to provide sealing contact with an inner wall of the drainer of the washbasin enabling to deposit sundries at the supporting part. 